<h1><p style="color:#0033FF;">Investigasi DNS detik.com dan itb.ac.id</h1>

Pada Tugas Sistem Keamanan Informasi Lanjut kali ini, kita disuruh untuk mencari DNS dari situs detik.com dan itb.ac.id, adapun rincian yang disuruh adalah:

1. Siapa pendaftar domain tersebut? (via whois)
2. Apa name server (NS) dari domain tersebut?
3. Apa mail exchange (MX) dari domain tersebut?
4. Dapatkah zone transfer dilakukan?
5. Untuk domain itb.ac.id, ada berapa domain tingkat empat (4th level domain)?
Buat daftarnya ^.^

Sebenarnya DNS itu apa sih?hmm....

DNS adalah Domain Name Server, yaitu server yang digunakan untuk mengetahui IP Address suatu host lewat host name-nya. Dalam dunia internet, komputer berkomunikasi satu sama lain dengan mengenali IP Address-nya.
Namun bagi manusia tidak mungkin menghafalkan IP address tersebut, manusia lebih mudah menghapalkan kata-kata seperti www.yahoo.com, www.google.com, atau www.facebook.com. DNS berfungsi untuk mengkonversi nama yang bisa terbaca oleh manusia ke dalam IP addresshost yang bersangkutan untuk dihubungi.
Berikut hasil pencarian DNS-nya :
DETIK.COM

Whois detik.com

Whois adalah salah satu cara untuk mengetahui identitas pemilik/ register suatu domain. Ada tools atau website yang menyediakan Who is tool yang gratis maupun berbayar. Namun kali ini saya ingin membagi info simple/ mudah saja untuk mengetahui who is secara cepat, yaitu dari browsing, anda hanya perlu mengcopy-paste url berikut:
http://www.webiihost.com/showwhois.php?domain=
Nah diujungnya itu silahkan anda tulisan nama domain yang ingin anda ketahui identitas pemiliknya, namun tanpa “www” ya, misal contoh:
http://www.webiihost.com/showwhois.php?domain=detik.com
maka akan dihasilkan data :

Registrant:
Siberkom, PT. Agranet Multicitra
Aldevco Octagon Building lt 2
Jl. Warung Jati Barat Raya 75
Jakarta, DKI Jakarta 12740
IN
Domain Name: detik.com
Administrative Contact, Technical Contact:
Siberkom, PT. Agranet Multicitra billing@registercentre.com
Aldevco Octagon Building lt 2
Jl. Warung Jati Barat Raya 75
Jakarta, DKI Jakarta 12740
IN
+62 21 7941177 fax: +62 21 7941176

Record expires on 28-May-2016.
Record created on 13-May-2004.
Database last updated on 12-Oct-2011 20:48:58 EDT.

Name Server detik.com

Domain servers in listed order:
ns.detik.net.id
ns1.detik.net.id

mx-record detik.com

Dengan menggunakan dig, didapatkan mxrecord dibawah ini:

ASPMX4.GOOGLEMAIL.com.
ASPMX5.GOOGLEMAIL.com.
ASPMX.L.GOOGLE.com.
ALT1.ASPMX.L.GOOGLE.com.
ALT2.ASPMX.L.GOOGLE.com.
ASPMX2.GOOGLEMAIL.com.
ASPMX3.GOOGLEMAIL.com.

4.Zone Transfer untuk detik.com tidak bisa diakses dari luar

itb.ac.id

1.Whois

Domain Information
Domain Name : itb.ac.id
Type : Education
Organization : Perguruan Tinggi
Registrant type : BUMN
Registrant Address :
Registration Date : 18 May, 1995
Date End : 30 September, 2012
Date Update : 07 July, 2011
Status Domain : Registered

Administrative Contact
Name : Basuki Suhardiman
NIC Handle : bs38
Organization : Institut teknologi Bandung
Billing Contact
NIC Handle : rinal1

Registrant Contact
NIC Handle : dnsad21

Technical Contact
NIC Handle : rinal1

2.Name Server

Name Server : ns1.ai3.net
Name Server : ns1.itb.ac.id
IP Address : 167.205.23.1
Name Server : ns2.itb.ac.id
IP Address : 167.205.22.123
Name Server : ns3.itb.ac.id
IP Address : 167.205.30.114
Name Server : sns-pb.isc.org

3.Mx-record dicari dengan menggunakan dig

mx1.itb.ac.id.
mx2.itb.ac.id.

4.Zone Transfer

Setelah difilter dengan pola subdomain.ITB.ac.id didapatkan daftar dengan jumlah 700, yaitu:

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